en A Comprehensive Gain Simulation of Vertical-Cavity Surface-Emitting Laser Considering Thermal Effect and Carrier Dependent تخصصی Special پژوهشي Research <p>In this paper, an opto-electro-thermal model is used to investigate dynamic gain behavior of quantum well vertical-cavity surface-emitting lasers (QW-VCSELs). This numerical model is solved by using finite difference time domain method in cylindrical coordinate system. We use two different models to present carrier-dependency of the gain: linear gain (LG) and carrier dependent nonlinear gain (CDNG). Our simulation results show that CDNG model has better gain profile. We study the effect of current spreading factor and injected current on the output gain of laser. Moreover, we investigate dynamic gain behavior of examined laser. We show that high current injection degrades output beam quality because of improvement of SHB effect and manifestation of higher order transverse modes.</p> <p>In this paper, an opto-electro-thermal model is used to investigate dynamic gain behavior of quantum well vertical-cavity surface-emitting lasers (QW-VCSELs). This numerical model is solved by using finite difference time domain method in cylindrical coordinate system. We use two different models to present carrier-dependency of the gain: linear gain (LG) and carrier dependent nonlinear gain (CDNG). Our simulation results show that CDNG model has better gain profile. We study the effect of current spreading factor and injected current on the output gain of laser. Moreover, we investigate dynamic gain behavior of examined laser. We show that high current injection degrades output beam quality because of improvement of SHB effect and manifestation of higher order transverse modes.</p> Carrier dependent nonlinear gain model, Index-guided Quantum well vertical-cavity surface-emitting laser, Spatial hole burning effect, Dynamic behavior of laser. Carrier dependent nonlinear gain model, Index-guided Quantum well vertical-cavity surface-emitting laser, Spatial hole burning effect, Dynamic behavior of laser. 994 997 http://opsi.ir/browse.php?a_code=A-10-1-930&slc_lang=en&sid=1 ramin asadi ramin asadi ramin1393@chmail.ir 10031947532846004223 10031947532846004223 No university of islamic azad university of islamic azad nasrindokht batenipour nasrindokht batenipour batenipour_nd@srbiau.ac.ir 10031947532846004224 10031947532846004224 Yes university of islamic azad university of islamic azad